cgroup/cpuset: rebind mm mempolicy to effective_mems, not mems_allowed
Summary
| CVE | CVE-2026-72010 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:20:59 UTC |
| Updated | 2026-08-17 06:17:58 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: cgroup/cpuset: rebind mm mempolicy to effective_mems, not mems_allowed Creating a child cpuset where cpuset.mems is never set leads to a div/0 when a VMA mempolicy with MPOL_F_RELATIVE_NODES rebinds in response to a CPU hotplug event. Reproduction steps: 1) Create a cgroup w/ cpuset controls (do not set cpuset.mems) 2) Move the task into the child cpuset 3) Create a VMA mempolicy for that task with MPOL_F_RELATIVE_NODES 4) unplug and hotplug a cpu echo 0 > /sys/devices/system/cpu/cpu1/online echo 1 > /sys/devices/system/cpu/cpu1/online 5) mempolicy rebind does a div/0 in mpol_relative_nodemask on the call to __nodes_fold() The cpuset code passes (cs->mems_allowed) which is not guaranteed to have nodes to the rebind routine. Use cs->effective_mems instead, which is guaranteed to have a non-empty nodemask once we reach that code path. [ david: add a comment, slightly rephrase description ] |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.115340000 (date 2026-08-17)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected ae1c802382f7af60aa54879fb4f5920a9df1ff48 b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d git | Not specified |
| CNA | Linux | Linux | affected ae1c802382f7af60aa54879fb4f5920a9df1ff48 fcc8c310539c3cc523419113b227161a96b50550 git | Not specified |
| CNA | Linux | Linux | affected ae1c802382f7af60aa54879fb4f5920a9df1ff48 4b06449384b9ee5b3372bab60601ba5cd4162086 git | Not specified |
| CNA | Linux | Linux | affected ae1c802382f7af60aa54879fb4f5920a9df1ff48 02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7 git | Not specified |
| CNA | Linux | Linux | affected ae1c802382f7af60aa54879fb4f5920a9df1ff48 fc680afc510157f6b137956011c09abc23eb0842 git | Not specified |
| CNA | Linux | Linux | affected ae1c802382f7af60aa54879fb4f5920a9df1ff48 c844b7d9a9586de15dd28c06da5cc7f6ab28787d git | Not specified |
| CNA | Linux | Linux | affected ae1c802382f7af60aa54879fb4f5920a9df1ff48 c17f06d8a085d6be58b544a440ce243f5e441a60 git | Not specified |
| CNA | Linux | Linux | affected ae1c802382f7af60aa54879fb4f5920a9df1ff48 b983c56426383e4a06fa5970c4e33cee879b1482 git | Not specified |
| CNA | Linux | Linux | affected 3.17 | Not specified |
| CNA | Linux | Linux | unaffected 3.17 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/c17f06d8a085d6be58b544a440ce243f5e441a60 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4b06449384b9ee5b3372bab60601ba5cd4162086 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/fcc8c310539c3cc523419113b227161a96b50550 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c844b7d9a9586de15dd28c06da5cc7f6ab28787d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b983c56426383e4a06fa5970c4e33cee879b1482 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/fc680afc510157f6b137956011c09abc23eb0842 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.